Support new stage RC 4 for 4.8.1 in wazuh-kubernetes repository

[davidjiglesias]

Description

This issue attempts to support a new stage RC 4 for 4.8.1 in the wazuh-kubernetes repository.

Tasks

• [x] Ensure changelog is updated for 4.8.1 (if applicable).
• [x] Bump revision for branch 4.8.1 on wazuh-kubernetes repository.
• [x] Change docker image tag in docker-compose to tag v4.8.1-rc4 in branch 4.8.1
• [x] Create tag v4.8.1-rc4 from branch 4.8.1 on wazuh-kubernetes repository.
• [x] Create and publish a pre-release: https://github.com/wazuh/wazuh-kubernetes/releases/tag/v4.8.1-rc4.
• [x] Change docker image tag in docker-compose back to 4.8.1 in branch 4.8.1

[CarlosALgit]

LGTM!